Exam One Study Guide

Last update by Madison on 09/16/2013
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5.

The speed at which a neural impulse travels is increased when the axon is encased by a(n)

A)

association area.

B)

myelin sheath.

C)

stem cell.

D)

endocrine gland.

Answer:
B) myelin sheath

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    6.

    Increasing excitatory signals above the threshold for neural activation will not affect the intensity of an action potential. This indicates that a neuron's reaction is

    A)

    inhibited by the myelin sheath.

    B)

    delayed by a simple reflex.

    C)

    an all-or-none response.

    D)

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    7.

    A slap on the back is more painful than a pat on the back because a slap triggers

    A)

    the release of endorphins.

    B)

    more intense neural impulses.

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    8.

    The chemical messengers released into the spatial junctions between neurons are called

    A)

    hormones.

    B)

    neurotransmitters.

    C)

    synapses.

    D)

    genes.

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    9.

    Reuptake refers to the

    A)

    movement of neurotransmitter molecules across a synaptic gap.

    B)

    release of hormones into the bloodstream.

    C)

    inflow of myelin through an axon membrane.

    D)

    reabsorption of excess neurotransmitter molecules by a sending neuron.

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    10.

    Opiate drugs occupy the same receptor sites as

    A)

    serotonin.

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    dopamine.

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    A)

    Alzheimer's disease.

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    schizophrenia.

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    Parkinson's disease.

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    A)

    cause the brain to stop producing certain neurotransmitters.

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    A)

    peripheral

    B)

    parasympathetic

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    sympathetic

    D)

    autonomic

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